Openapi property with the type const resolving as z.unknown()

[zamaraevk]

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Describe the bug
A clear and concise description of what the bug is.

I am trying to generate zod schema from openapi json file where property type as const and it's generates z.unknown()

Minimal reproduction

• Either paste your input OpenAPI schema reduced to the relevant part here
• OR paste a link to the online playground (hit cmd+s or click in the Actions > Save) to generate a shareable link

"components": { "schemas": { "Pet": { "type": "object", "required": ["id", "name"], "properties": { "id": { "type": "integer", "format": "int64" }, "name": { "type": "string" }, "tag": { "type": "string" }, "type": { "const": "BULLDOG", "title": "Type of dog" } } },

RESULT:

const Pet = z .object({ id: z.number().int(), name: z.string(), tag: z.string().optional(), type: z.unknown().optional() }) .passthrough();

Expected behavior
A clear and concise description of what you expected to happen. Ideally, what the generated code would look like.

Should be:

z.literal("BULLDOG").optional()

Additional context
Add any other context about the problem here.

LINK to Playground